I've flown J3 floatplanes in Florida and excellent fun, there are so many aspects of flying that many don't try - I say try them all!
Having spent 17 years flying powered my brain went into EFATO on my first practice cable brake off a tow-plance in the glider so I was infact turning back for the airfield far too fast!!!
There are a few powered gliders of the type that the engine and prop pops out from inside the fuselage behind the cockpit - but of course they are then classed as SLGs so can't beat up the ridges at zero feet about the tree lines like we do!
All the best to all, if you get the chance - try the £25 trial glider flight option when you next pass a gliding school.